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AKA retarded. Sometimes when you're hanging out with your friends this kind of behavior is acceptable; however, in the general public you should definitely limit your dumbassness. Acting loud, stupid; making poor decisions regarding life. See also teenage boy.
Sitting alone in his room at night, with no one else to even talk to, Steven finally realized something: he was a dumbass.
dumbass by reformedpug December 4, 2016
someone who can't think for themsleves and follows what others tell them to do especially fake bestfriends orders
hey man do this with me, and we're gonna do this later....

ive never done that before and im kinda against it but ok!
dumbass by nfg May 10, 2005
Anyone who spends all their money at strip clubs because they are to stupid to get a date and they are still living with their parents at 25 being told what to do all the time because they have an IQ of 50 and don't have enough money to move out because they can't hold onto a job without getting fired.
Chris is so retarded! He can't talk to women because he is stupid so he spends all his money at strip clubs. What a dumbass!
Dumbass by Freedy Martins October 26, 2009
an extreme of something, can be used as an adjective.
That fool is dumbass high

There were dumbass RDB' s at that party last night.
dumbass by george tedbetter July 24, 2006
something that starts with a d and ends with a bass.. theres a little ummm in the middle.. thus D-UMM-BASS..
err this is such a dumbassedly dumbassed definition... alliteration is the name of the game...